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<table width="100%" summary="page for sitka89"><tr><td>sitka89</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Growth of Sitka Spruce Trees</h2>

<h3>Description</h3>

<p>Impact of ozone on the growth of sitka spruce trees.
</p>


<h3>Usage</h3>

<pre>data(sitka89)</pre>


<h3>Format</h3>

<p>A dataframe 
</p>

<dl>
<dt>size:</dt><dd><p>size of the tree measured in <i>log(height*diamter^2)</i></p>
</dd>
<dt>time:</dt><dd><p>days after the 1st january, 1988</p>
</dd>
<dt>tree:</dt><dd><p>id number of a tree</p>
</dd>
<dt>treat:</dt><dd><p>ozone: grown under ozone environment, control: ozone free</p>
</dd>
</dl>



<h3>Examples</h3>

<pre>
data(sitka89)

</pre>


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